In order to satisfy the request of high-speed and high-precision grating demodulator,a high-speed frequency swept laser light source is designed based on semiconductor optical amplifier.This light source uses the work pattern of Fourier Domain Mode Locking and ring cavity geometry.It can provide narrow band tuning light for grating demodulation,and the tuned frequency is above 2 000 Hz.The output light power is higher than 12 dBm,and the source can greatly improve the speed and SNR of grating demodulator.Un...